In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage
The encapsulation and heat conduction of molten salt are very important for its application in heat storage systems. The general practice is to solidify molten salt with ceramic substrate and enhance heat conduction with carbon materials, but the cycle stability is not ideal. For this reason, it is...
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/20/6032 |
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| author | Bo Yang Yang Liu Wenjie Ye Qiyang Wang Xiao Yang Dongmei Yang |
| author_facet | Bo Yang Yang Liu Wenjie Ye Qiyang Wang Xiao Yang Dongmei Yang |
| author_sort | Bo Yang |
| collection | DOAJ |
| description | The encapsulation and heat conduction of molten salt are very important for its application in heat storage systems. The general practice is to solidify molten salt with ceramic substrate and enhance heat conduction with carbon materials, but the cycle stability is not ideal. For this reason, it is of practical significance to study heat storage materials with a carbon-free thermal conductive adsorption framework. In this paper, the in-situ reaction method was employed to synthetize the constant solid-state composites for high-temperature thermal energy storage. AlN is hydrolyzed and calcined to form h-Al<sub>2</sub>O<sub>3</sub> with a mesoporous structure to prevent the leakage of molten eutectic salt at high temperature. Its excellent thermal conductivity simultaneously improves the thermal conductivity of the composites. It is found that 15CPCMs prepared with 15% water addition have the best thermal conductivity (4.928 W/m·K) and mechanical strength (30.2 MPa). The enthalpy and the thermal storage density of 15CPCMs are 201.4 J/g and 1113.6 J/g, respectively. Due to the excellent leak-proof ability and lack of carbon materials, the 15CPCMs can maintain almost no mass loss after 50 cycles. These results indicate that 15CPCMs have promising prospects in thermal storage applications. |
| first_indexed | 2024-03-10T06:25:42Z |
| format | Article |
| id | doaj.art-2d8df28915be4455a5bf37a222bf66d4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:25:42Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-2d8df28915be4455a5bf37a222bf66d42023-11-22T18:58:04ZengMDPI AGMaterials1996-19442021-10-011420603210.3390/ma14206032In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy StorageBo Yang0Yang Liu1Wenjie Ye2Qiyang Wang3Xiao Yang4Dongmei Yang5Joint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaJoint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaJoint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaJoint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaJoint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaJoint Laboratory of Regional Energy Internet Technology and Application of State Grid Corporation, State Grid Electric Power Research Institute, Nanjing 211106, ChinaThe encapsulation and heat conduction of molten salt are very important for its application in heat storage systems. The general practice is to solidify molten salt with ceramic substrate and enhance heat conduction with carbon materials, but the cycle stability is not ideal. For this reason, it is of practical significance to study heat storage materials with a carbon-free thermal conductive adsorption framework. In this paper, the in-situ reaction method was employed to synthetize the constant solid-state composites for high-temperature thermal energy storage. AlN is hydrolyzed and calcined to form h-Al<sub>2</sub>O<sub>3</sub> with a mesoporous structure to prevent the leakage of molten eutectic salt at high temperature. Its excellent thermal conductivity simultaneously improves the thermal conductivity of the composites. It is found that 15CPCMs prepared with 15% water addition have the best thermal conductivity (4.928 W/m·K) and mechanical strength (30.2 MPa). The enthalpy and the thermal storage density of 15CPCMs are 201.4 J/g and 1113.6 J/g, respectively. Due to the excellent leak-proof ability and lack of carbon materials, the 15CPCMs can maintain almost no mass loss after 50 cycles. These results indicate that 15CPCMs have promising prospects in thermal storage applications.https://www.mdpi.com/1996-1944/14/20/6032thermal energy storagein-situ reaction15CPCMsthermophysical properties |
| spellingShingle | Bo Yang Yang Liu Wenjie Ye Qiyang Wang Xiao Yang Dongmei Yang In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage Materials thermal energy storage in-situ reaction 15CPCMs thermophysical properties |
| title | In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage |
| title_full | In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage |
| title_fullStr | In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage |
| title_full_unstemmed | In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage |
| title_short | In-Situ Reaction Method to Synthetize Constant Solid-State Composites as Phase Change Materials for Thermal Energy Storage |
| title_sort | in situ reaction method to synthetize constant solid state composites as phase change materials for thermal energy storage |
| topic | thermal energy storage in-situ reaction 15CPCMs thermophysical properties |
| url | https://www.mdpi.com/1996-1944/14/20/6032 |
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